Crassula helmsii is widespread across the UK, and increasing, to the detriment of less robust native species; it originates from discarded aquarium plants.
Common names:
New zealand pigmyweed, Australian swamp stonecrop
Family:
Scientific name:
Crassula helmsii
Main flower color:
Range:
England, Wales and southern Scotland; an introduced species
Height:
A few cm - a prostrate, mat forming species
Habitat:
Shallow water and pond margins
Flowers:
Formed of four triangular white petals and four green sepals about half as long. Four anthers are positioned above the sepals; they have white filaments and orange-purple anthers. Flowers are attached by stalks of similar length to the leaves
Leaves:
Linear, thick, up to 15 mm long, pointed at the tip
Season:
June to September
Rarity:
★★★★★
